The first seven chapters of this volume were written by W. L. Sclater, and published in the Geographical journal (1894-97). The eighth chapter was read by P. L. Sclater at a meeting of the Zoological society of London in 1897, and subsequently published in the society's Proceedings. The remaining chapters have been prepared by P. L. Sclater specially for this work
"List of the principal authorities referred to" at end of chapters I to VI
Some of the pages of advertisements at the back of this book are printed very close to the gutter; minor cropping has ensued.